Telephone head set



Mar. '13, 1923. 1,447,969; F. DIETRICH. TELEPHONE HEAD'SE'T. I FILED MAY 12. 1922.

FREDERICK DIETRICH, OF FLUSHING, NEW-YORK, ASSIGNOR TO C. BRANDES INQ, OF

NEW YORK,N. Y., A CORPORATION or NEW YORK.

TELEPHONE HEAD SET.

Application filed my 12,

To all whom 2'2. may concern:

Be it known that I, FREDERICK Dinrriucrr, a citizen of the United States, residing at Flushing, in the county of Queens, State of 5 New York. have invented certain new and useful Improvements in Telephone Head Sets; and I do hereby declare the following to be a full. clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This, invention is directed to improve-: ments in telephone headsets and has among its objects the provision of a device whereby the user of the headset may easily and quickly adjustthe rece ivers to his ears; the provision of a simple but dependable arrangement for securing the aforementioned device to the headband; and an improvement in the padding of the headband by the elimination of seams which practical experi ence has shown have a tendency to rip open due, it is believed, to the action "of perspiration or oil from the hair of the user on the stitching.

One of the principalfeatures of the invention relates to the device before mentioned for adjusting thereceivers to the ears of the user. This device is preferably in the form of a collet chuck having a concentric aperture in which a rod forming a part of a receiver supporting member is slidably and rotatably mounted. By means'of an adjusting nut having a tapered thread engaging the collet, the latter may be contracted to securely grip the rod, and thus when the receivers are adjusted to the satisfaction of the user he may, by simply turn ing the adjusting nut, fasten them in that 40 position. This device, as will be seen, en

gages the rod on practically its complete circumference and its design is such that a powerful gripping action is obtained even with a. relatively slight turn of the nut.

Another feature relates to the arrangement for fastening the headband to the adjusting device just referred to and is particularly advantageous in conjunction with that type of adjusting device. This feature,

in its preferred form, consists in the useof a pair of washers having grooved adjacent faces between which the ends of the wires forming the frame of the headband. are rigidly secured, the wires being seated in 1922. Serial No. 560,273. 9

the grooves. Although, as stated, it is preferable to'use two washers, this is not at all essential as one of the washers may be dispensed with by making the flange of the collet of 'suflieient diameter and providing a groove in that. There is, however, a de cidedeconomy effected by the use of two washers instead of one due to the larger use of what is known inthe textile trade as tubular webbing and may be either a Woven or knitted fabric in the form of a tube. The webbing is out to the desired lengths and its ends protected against unravelling by con'ipressing metal tips thereon. It is then slipped over the wiresof the headband, suitable'apertures being provided in the metal tips-for through. Not only is the headband im- .;proved by virtue of this feature, but a decided economy in manufacture is thereby effected by reason of the fact that no sewing is required. The appearance of this sea-inless padding is also much more attractive.

It is thought that the'invention will be more readily un'derstood from a detailed description 1 in conjunction =with the accompanying drawings, in which,

Fig. l is a fragmentary perspective view of a headset, the receiver not being shown;

Fig. 2 is a perspective view showing how the fabric used for paddingthe headband actually appears; and

Fig. 3 is an elevational view of a receiverv supporting member ordinarily called ayoke pern'iitting the wires 'to pass and a ,view partly in cross section of the de-v vice-by which the receivers are adjusted to the ears of the user.

The headset ordinarily comprisestwo watch case receivers, each, of which is pivotally supported in a yoke l by means of the studs 2 whichv are sprung int-o apertures provided inthe receiver casings. The

yokes 1 are each riveted or otherwise. se-

cured to a roundrod 3. I

The headband, only a portion of which is shown in Fig. lfcomprises a pair of suitably I hand to i and the wires 4 the an adjusting device .3. This device somewhat resembles a chuck bentspring wires 4 and these wires are each padded with a seamless knitted or woven tubular Webb-ing 5. knitted as to provide a tunnel-like opening 5 as shown in Fig. 2. For the purpose of preventing the ends of the paddings 5 unravelling and to improve the general appearance of the headset, the ends of the paddings are provided with metal tips 6 having apertures through which the wires at ass.

ach end of the headband is secured to asbest shown in Fig.

of the type used in screw machines and comprises a collet 7 having a concentric'aperture through which, the rod 3 m'ay freely slide. This collet is preferably made of hard brass and its threaded portion .is split longitudinally into three or four sectors as clearly illustrated in Fig. 3. The knurled nut 8 has a tapered internal thread for enaging the thread on the collet 7 and in rawing up the nut 8 the collet 7 is contracted and firmly grips the rod 3. For securing the ends of the wires 4 of the headthe adjusting device, a pair of washers 9, each having a. circular groove 9 in one of its faces are, assembled onthe sleeve 10 which is integral with the collet 7. The ends of form to the rooves 9 in which these wires are seated. fterthe wires t have been p0- sitioned between the washers-.9, the end of the sleeve 10 is upset preferably by a spinning process to tightly grip the washers 9 'rebetween.

To provide against the rod 3 accidentally disengaging itself from the adjusting device, the end'of the rod is tap ed and a screw 11 having a ball' shape threaded into the end of the rod. The ballheaded screw 11 may be inserted and removed with the fingers, no screw driver being required thus facilitatin assembly and disassembly for shipping and its shape adds materially to the ornamental appearance of the headset.

While I have form of my invention, stood that the appended;

described the preferred it is to be underclaims are not limited to the specific structure shown.

This fabric is SO engaging said chuck,

the wires 4 are curved to con-' head is f tween said I claim spring collet chuck fixedly attached to Slld head band, a supporting member to whicha receiver is adapted tobe attached, said supporting member including a rod, said rod extending through said chuck and adapted to be gripped thereby and means for ad-- justing said chuck for varying its grip on said rod.

2. In a telephone headset, a head band, a split spring collet chuck fixedly attached to said headband, a supporting member to which a receiver is adapted to be attached, said supporting member including a rod, said rod extending through said chuck and adapted to be, gripped thereby, and a nut said nutbemg operable for adjusting said chuck for varying its grip on said rod.

3. In a telephone headset, a spring collet chuck having a reduced'end portion form1 ing a shoulder, said chuck having a con centric aperture, a pair in super-position on said reduced end por tion, one of said washers bearing against said shoulder, portion being upset tosecure said washers in place, a wire headband having an end portion secured between said washers, a telephone receiver supporting member including a rod, the said rod extending through said aperture in said chuck and adapted to be gripped thereby, and a nut engaging said chuck, said nut being operof W ashers mounted the end of said reduced end I its grip on said rod. i v l. In a telephone headset, a receiver supporting member including a rod, an adjust able gripping device for frictionally holding said rod,said device including an apertured collet in which said rod may freely slide, said collet having a reduced end por tion, a pair of grooved'washers on said reduced end portion, a. headband secured bewashers and seated grooves in said washers, and the end of said reduced portion being upset to securely grip said headband between said washers.

In testimony whereof I affix my signature in the 

